This is excellent advice.Old school, and one I'd recommend to a new smoker:
Fill half way with a tobacco that's ok. Smoke slowly to the bottom. Repeat 4-5 times, then load and smoke as usual.
Enjoy!
I’d add that coating the inside of the bowl with a dab of honey (not too much,,,just a little) never hurt the process.
And I’d also emphasize smoking all the way down to the air hole, for the first dozen or so smokes.
I am convinced the break in process uses heat to further cure the briar.
After a dozen or two smokes, the briar pipe is good for many, many thousands more and it’s better, than it was when new.